Searching for a top-rated application modernization services company to future-proof your business? Our directory provides industry-leading experts specializing in transforming legacy systems. With insights from verified client experiences and success stories, we make it easy for you to compare options based on location, budget, and hourly rates to find your next agency partner. 

Best App Modernization Services Agencies

8 Companies-Rankings updated: October 26, 2026

Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

Application Modernization Services × Industrial × Sort by: Top Rated ×Clear Filters
  • Gnar Helps Companies Accelerate Their Software Development

    The Gnar Company designs and developed robust, reliable AI solutions and software products built to grow and scale. We help companies build foundational web and mobile applications like their in-house teams...

    Top Services:

    • Software Development
    • Mobile App Development
    • UI/UX Design
    • Web Design
    • AI Development
    • Show more
    Location
    Boston, Massachusetts
    Number of Employees
    Under 49
    Average Hourly Rate
    $150/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    10 Projects Listed
  • Software, data & AI consulting from Sarajevo

    RUBICON is a software, data and AI consulting company founded in 2013 in Sarajevo, Bosnia and Herzegovina, serving clients across Europe and North America...

    Top Services:

    • AI Development
    • IT Services
    • Software Development
    • Mobile App Development
    • Big Data Analytics
    • Show more
    Location
    Sarajevo, Bosnia and Herzegovina
    Number of Employees
    Under 49
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $25,000 - $50,000
  • Business software with AI inside, built in Houston since 2004.

    Espresso Moon is a Houston custom software company that builds AI-enabled business applications, mobile apps, and cloud platforms for B2B clients, and hosts and supports everything it delivers. We also own and operate GageList, a calibration management SaaS with AI built into the product...

    Top Services:

    • AI Development
    • Software Development
    • Mobile App Development
    • Software Testing
    • UI/UX Design
    • Show more
    Location
    Spring, Texas
    Number of Employees
    Under 49
    Average Hourly Rate
    $150/hr
    Minimal Budget
    $25,000 - $50,000
  • Custom Software & AI for Growing Businesses

    Adaptyve Digital helps growing businesses build custom software, AI solutions and workflow automations that solve real operational challenges. With 25+ years of experience, we provide senior technical expertise without the overhead of a traditional agency...

    Top Services:

    • Software Development
    • AI Development
    • Mobile App Development
    • Web Development
    • eCommerce Development
    • Show more
    Location
    Houston, Texas
    Number of Employees
    Under 49
    Average Hourly Rate
    $175/hr
    Minimal Budget
    $1,000 - $10,000
  • Custom software & artificial intelligence atelier

    Our focus it to build together with our customer the best solution. We count on multidisciplinary and generalist software design and engineering teams, experts in digital products, focused on serving with quality and agility...

    Top Services:

    • Software Development
    • Mobile App Development
    • UI/UX Design
    • Product Design
    • Staff Augmentation
    • Show more
    Location
    Curitiba, Brazil
    Number of Employees
    50 - 99
    Average Hourly Rate
    $50/hr
    Portfolios Count
    8 Projects Listed
  • AI transformation execution, LLM, OCR, custom software engineering, legacy modernization, UI/UX

    Azati specializes on agentic AI engineering, enterprise AI integration, Legacy-to-AI modernization, custom business software, web apps & UI design...

    Top Services:

    • Software Development
    • AI Development
    • Software Testing
    • Big Data Analytics
    • Mobile App Development
    • Show more
    Location
    Warsaw, Poland
    Number of Employees
    250 - 499
    Average Hourly Rate
    $40/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    12 Projects Listed
  • We Provide Strategic Digital Success.

    At Feralvoice, we specialize in crafting digital products and online experiences tailored to support your development, innovation, and transformation initiatives. Our expertise lies in delivering solutions that drive growth and facilitate meaningful progress in the digital realm...

    Top Services:

    • Web Development
    • Web Design
    • UI/UX Design
    • eCommerce Development
    • WordPress Website Design
    • Show more
    Location
    Ranchi, India
    Number of Employees
    100 - 249
    Average Hourly Rate
    $100/hr
  • From Idea To The Summit

    We are a software development company specializing in custom web, mobile, and enterprise solutions. We help businesses of all sizes transform their ideas into scalable digital products using modern technologies. From ERP, CRM, POS systems, and eCommerce platforms to AI-powered dashboards and business...

    Top Services:

    • Web Design
    • Web Development
    • AI Development
    • Mobile App Development
    • Software Development
    • Show more
    Location
    Madinah, Saudi Arabia
    Number of Employees
    Under 49
    Minimal Budget
    Under $1,000
    Portfolios Count
    1 Project Listed

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Every agency is independently vetted before it can be listed or ranked

1

Identity Check

We verify businesses and reviewer LinkedIn profiles for integrity.

Agencies vetted
129,759+
2

Portfolio Review

We review agency work, case studies, and results to confirm skill.

Applicants rejected
47%
3

Ongoing Audit

We monitor listings regularly; outdated agencies are removed.

Agencies verified
8

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